Automatic cut-off



1 1930- s. E. MURPHY ET AL AUTOMATIC CUT-OFF I Filed Dec. 17, 1928 3mm 1 5E. Mu aky z 3 Z v Patented ED T' T S PA ENT." OFFICE" SYLVESTER E. MURPHYA'ND, crmnnns L. GALLIAN, or Russian, KENTUCKY v 7 AUTOMATIC CUT-OFF Application filed December 17, 1928. Serial No. 326,495.

This invention relates to new and useful ternally vthreaded tubular extension 18, in improvements in valves,".and particularly to which is disposed a packing 19, having a cenpressure valves. i V tral opening 20, alining with an opening 21 :The principal object. of the present invenin the said end of the body, and on which is tion is to provide a valve, of novel construcengaged a closure cap 22. 7

tion, by means of Which'gasor :liquid pres- In the normal operation of the device, fluid sure will'be automatically cut oil, when such is permitted to flow into the casing by means pressure becomes reduced below. a predeterof the branch 12, such pressure serving to ree mined degree, whereby to prevent escape of tain the ball valve on the seat 14:, whereby i 10 such gasor liquid, 5' i to prevent escape offiuid through the vent Another object is "toprovide novel and 16. 'The fluid'will flow through the seat 17 simple means for restoringthevalveto norand out through the branch 13. Should the 7 mal operative condition, after havingbeen pressure bereduced at the inlet branch 12, closed by reduction of pressure. Y the ball valve 15 would fall from the seat Other objects and advantages will be aplet and rest on the seat 17 thereby preventing parent from the following description When passage of fluid from the inlet branch 12 to taken'in connection with the accompanying the outlet branch 13. To restore the valve drawing. V I to operative condition, the operator removes In the drawing: the cap 22, and inserts the rod 23, and by v 20 Figure lis avertical sectionalview through proper manipulation moves the ball 15 upan automatic cut-ofl' valve, made in accordwardly so that it may be forced on the seat ance with the present invention',{'and show- 14: ,bythe incoming fluid, and be heldtliere ing the valve in operative position.-- by the pres'sure of such fluid. c

Figure 2 is a similar sectional 'view, show lVhat is claimed is: 1 ing the use of a, rod for restoring the, ball An automatic pressure valve including a valve to its operative position; 7 casinghaving an'inlet and an outlet means,

' Referring particularly to the accompanya valve seat arranged opposite the inlet means ing drawing, there is shown acasing'includand having-a vent opening, a valve seat aringthe longitudinalbody portion 10',one' end ranged in a plane at right angles to the first 30 beingopen and internally threaded to'receive seat,and intermediate the inlet and outlet,

the removable closureplugll, Inone side a ball valve normallyheld on the first seat of said end there is formed a branch 12 which by the pressure of the incoming fluid and to is adaptedtobe connected with the source of gravitate to the other seat upon reduction 1 gas or fluid supply, while the other end of of the pressure of such fluid, the casing hav- 35, the body is closed and has the branch13 eX- ing an opening. in line with the second seat tending from the other side thereof, for C 1- and provided with packing and a closure, and nection withaconduit (not shown) leadingto a rod arranged to be passed through said the point of use of such gas or fluid. In the pi hing and opening for moving the valve,

' d 0f the fi -m n d d h ody from" the second seat into position between t 10, directly opposite the"'inle,t branchv 12, saidinlet and said vent, whereby it will be v h re s f a Seat 14 o gthe ball Valve seated on the first seat by the pressureof the Y 15, and in the center of said seat, leading out fl id, I I v tO thG atm0sphere,is a small vent v Formed testimony whereof We aflix our igflw.

in the body 10-, between the inlet andjoutlet t f a the ball valve 15 is adapted to fall, upon re- GHAS L GALLIAN,

duction of pressure entering the casing by means of the branch 12. Onthe closed end of the body, in line with the bore'of said body, and externally thereof, there is formed an ex- 7 10o branches 12 and 13, is avalve seat 17, on which SYLVE I l V 

